Pentax KX KX Manual - Page 23

DUAL PREFERENCE EXPOSURE SYSTEM The exposure system built into the KX is called a "needle-matching system" because the correct exposure for any given situation is determined by matching the two needles - blue and black - seen in the viewfinder. This system is most convenient because it allows you to give preference to either aperture or shutter speed. When the aperture size is the most important factor, set the aperture desired by turning the diaphragm ring. Then adjust the shutter speed dial until the blue needle in the viewfinder matches up with the black needle. When shutter speed is the more important factor, turn the dial till the blue needle reaches the speed you desire. Then adjust the diaphragm ring to align the black needle with the blue one. •21 WI • 518 nI 0 a 2